GB/T 3077 12CrNi2 round bars

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11-May-2024

GB/T 3077 12CrNi2 alloy structural steel, is a high cementation steel.GB/T 3077 12CrNi2 can be produced into hot rolled round bars and square bars, cold-drawing bars,forged bars. We henan KUNFENG can supply GB/T 3077 12CrNi2 all of shapes.

GB/T 3077 12CrNi2 round bar

According to the market needs, henan KUNFENG supply the oversea markets for GB/T 3077 12CrNi2 hot rolled round bars OD 6mm -80 mm and 12CrNi2 forged round bars OD 80 mm - 1200 mm, also GB/T 3077 12CrNi2 forged square bars OD 100- 1200 mm. The OD tolerance is about 0-3 mm and length tolerance is about 0-20 mm.

are usually produced under the followed procedures: EAF arc furnace + LF purify affinage + VDF + ingot steel(bottom gating /argon) + forged + annealing + black polishing (turnery) + GB/T6402-92 ΙΙ UT test + smooth edges with sawing .

chemical composition by %,maximum

Grade	C	Si	Mn	Cr	Ni	Cu	P	S
GB/T 3077 12CrNi2	0.1-0.17	0.17-0.37	0.3-0.6	0.6-0.9	1.5-1.9	≤ 0.03	≤0.035	≤0.035

mechanical properties

Grade	Delivery State	T.S. N/mm2 Min	Y.S. N/mm2 Min	A,% Min	Z,% Min	Hardness, (annealing or tempering) HB,max	Forging ratio	Grain Size (level)	Nonmetal ratio
GB/T 3077 12CrNi2	Hot rolled, forged, or heat treatment	785	590	12	50	207	≥ 4:1	≥ 6	≤ 2.0